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A preparation method of electrochromic liquid crystal microcapsules for textiles

An electrochromic and microcapsule technology, which is applied in the fields of fine chemicals and material science, can solve the problems of unsuitable dye-doped liquid crystal microcapsules, easily polluted dyes, and small loading capacity of core materials, and achieve bright colors, The effect of bright and changeable color and narrow particle size distribution

Active Publication Date: 2019-06-07
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods are not suitable for the preparation of dye-doped liquid crystal microcapsules, because the dyes are easily polluted and the dyes are easily doped in the polymer matrix during the preparation of the microcapsules, resulting in staining. more difficult
Foreign Do Hyun Kim's research group prepared a dye-doped liquid crystal microcapsule through diaphragm emulsification technology, and applied it to intelligent color-changing windows. Textile field

Method used

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  • A preparation method of electrochromic liquid crystal microcapsules for textiles
  • A preparation method of electrochromic liquid crystal microcapsules for textiles

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Mix 0.001g of C.I. Disperse Red 60 and 1g of mixed liquid crystal E7 and heat it until it is completely dissolved and becomes transparent. After stirring at this temperature for 0.5h, cool down until the mixture becomes colored or turbid, and then heat up until it is just transparent. Stir at constant temperature for 0.5h to obtain dye-doped liquid crystal.

[0027] Keep the obtained dye-doped liquid crystal at the clearing point temperature, and add it dropwise to an aqueous solution containing 0.1 g of dispersant 0402 at the same temperature under mechanical stirring, and emulsify at a high speed to form a uniform dispersion; add 0.15 g of acrylic acid n-Butyl ester and 0.15 g of methyl methacrylate were uniformly mixed and added dropwise to the liquid crystal dispersion, and the emulsification was continued for 60 minutes. Then transfer to a four-necked flask with condensing reflux and stirring device, nitrogen gas for 5 minutes, at a stirring speed of 800 rpm, heat ...

Embodiment 2

[0029] Mix 0.01g of C.I. Disperse Blue 60 with liquid crystal 5CB, heat it until it is completely dissolved, stir at this temperature for 1 hour, cool down until the mixture becomes turbid, then raise the temperature until it is just transparent, and stir at constant temperature for 2 hours to obtain the dye doped type LCD.

[0030]Keep the obtained mixed liquid crystal at the temperature of clearing point and add it dropwise to the aqueous solution containing 0.5g OP-10 at the same temperature under mechanical stirring, and emulsify at high speed to form a uniform dispersion; mix 2g styrene and 1g ethyl acrylate, After mixing, add dropwise to the liquid crystal dispersion, then add dropwise to the liquid crystal dispersion, and continue to emulsify for 30 minutes. Then transfer to a four-necked flask with condensing reflux and stirring device, nitrogen gas for 10 minutes, at a stirring speed of 400 rpm, heat up to 80°C, add 10 g of an aqueous solution containing 0.05 g of pot...

Embodiment 3

[0032] Mix 0.005g of C.I. Disperse Blue 359, 0.005g of C.I. Disperse Red 1 and 1g of Liquid Crystal 7CB, then heat until completely dissolved, stir at this temperature for 3 hours, cool down until the mixture becomes turbid, then heat up to just transparent, and stir at constant temperature for 5 hours , that is, dye-doped liquid crystal.

[0033] Keep the obtained mixed liquid crystal at the temperature of the clearing point, add it dropwise to an aqueous solution containing 0.2g Tween80 at the same temperature under mechanical stirring, and emulsify at a high speed to form a uniform liquid crystal dispersion; mix 1g n-octyl methacrylate and 1g acrylic acid- 2-Ethylbutyl ester, after mixing evenly, add dropwise to the liquid crystal dispersion, and continue to emulsify for 120 minutes. Then transferred to a four-necked flask with condensing reflux and stirring device, nitrogen gas for 20 minutes, at a stirring speed of 1000 rpm, the temperature was raised to 75°C, and 10 g of...

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Abstract

The invention discloses a method for preparing electrochromic liquid crystal microcapsules for textiles, belonging to the technical fields of fine chemical industry and material science. The electrochromic liquid crystal microcapsules prepared by this method not only have bright and changeable colors, but also can meet people's requirements for clothing individuation and diversity; they also have good solvent resistance and water resistance, uniform particle size, high core material loading, and drive The voltage is low, and the original color performance can still be maintained after textile processing. And when applied, the shell structure of the liquid crystal microcapsule can not only protect the liquid crystal, but also participate in film formation, which is more suitable for the requirements of textiles.

Description

technical field [0001] The invention relates to a method for preparing electrochromic liquid crystal microcapsules for textiles, belonging to the technical fields of fine chemical industry and material science. Background technique [0002] Nematic liquid crystals have considerable fluidity, and changes in the external field will cause fluctuations in the orientation of nematic molecules. This fluctuation modulates the material's refractive index microscopically and leads to strong light scattering. The nematic liquid crystal host material is doped with some dichroic dyes (this dye changes the absorption spectrum due to the change of molecular direction, and has light absorption anisotropy) to form a pair of guest-host materials. Generally speaking, the director of the dichroic dye in the liquid crystal environment is consistent with the director of the liquid crystal. Therefore, the nematic liquid crystal doped with a dichroic dye is in a colored state when the circuit is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M23/12D06M15/263D06M15/233D06M15/333D06P1/44D06P1/52B01J13/14C08F220/18C08F220/14C08F212/08C08F218/08
CPCB01J13/14D06M15/233D06M15/263D06M15/333D06M23/12D06P1/445D06P1/525C08F212/08C08F220/14C08F220/18C08F220/1812C08F220/1808C08F220/1804C08F218/08
Inventor 付少海张丽平盛明非田安丽李敏
Owner JIANGNAN UNIV
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